Yana Toboso is a manga artist and representative of the creative studio D-6th. She created the original concept for Disney Twisted-Wonderland and is the main scenario writer and character designer. Toboso is also well known for creating the popular manga series Black Butler . Suzuka Oda is a manga artist and illustrator. She made her debut as a manga artist with an adaptation of Manabu Kaminaga's novel series Shinrei Tantei Yakumo (Psychic Detective Yakumo), which began publication in Kadokawa's Asuka magazine in Japan in 2009 and lasted for 14 volumes. She is primarily known in English for her work on the manga adaptation of Nisio Isin's novel series Pretty Boy Detective Club , available from Vertical.